Fire-proof floor construction.



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P'ATENTBD MAY 20, 1903.

O. F. BUENTE. FIREPROOP FLOOR CONSTRUCTION.

APPLIOATION NLBD APB. 27. 1900. RBNEWBD 001:28. 1902.

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No.v 728,857.

No MODEL.

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VUNrTnD STATES Patented May 26, 1903.

PATENT. OFFICE.

FIREPROOF FLOOR CONSTRUCTION.

SPECIFICATION forming part of Letters Patent No. 728,857, dated May 26, 1903.

' Application filed April 27,1900. Renewed October 28, 1902. Serial No. 129,176- (No model.)

at right angles to the main floor-beams, of av tireproof floor construction formed in accordance with my invention. Fig. 2 isa partial vertical cross-section at right angles to that of Fig. 1. Fig. 3 is a partial cross-section showing another form of my invention in connection with ordinary metal mainbeams.-

Fig. 4 is a detail view ofv the web member I preferably employ; and Fig. 5 is a view similar to Fig. 2, showing a modified construction.

My invention relates to the construction of ireproof liooring, and is designed to provide a cheap and simple construction which shall be of great strength, maybe easily adapted to different arrangements of main beams, and may, if desired, be built in place without the use of temporary supports.

In the drawings, referring to the form of Figs. 1 and 2, 2 represents a side wall having the usual supporting angle-iron 3, and 4 is a main door-beam, which I have shown as composed of concrete lled in around and inclosing a series of web members 5. These web members consist of a lower tension member 6,'whioh may be formed of a metal bar or rod or a wire rope, and a latticed construction extending upwardly therefrom and preferably formed of interwoven wires 7. The preferred construction of this web member is shown in Fig. 4.

The main door-beams are connected to each other and to the walls by transverse beams 8, also of concrete, and each containing a web member 9, similar to that shown in Fig. 4.

The concrete of the transverse beams is preferably formed integrally with that of the main beams where the construction of Fig. 1 is employed, and the concrete of the transverse beams is integrally joined over ,the tops of permanent refractory centers 10. These archedfshaped hollow centers 10 are preferably provided with a central web 11 and are placed between the web members around which the concrete transverse beams are formed. The wooden sleepers 12 are placed directly over the web members and preferably secured thereto by a staple 13 or in any other desirable way, the concrete being lled around the lower portions of the sleepers, so as to embed them in the door.

In building the Iioor a temporary understructure is provided upon which the refractory centers are placed, and the web members being placed in their proper positions and secured to sleepers the concrete is supplied'between and over the centers and around all the web members, thus forming the main beams and the transverse supporting-beams, each transverse beam having a web or latticed strengthening-grid. Instead of using the temporary supports the refractory centers may be supported from the lattioed member by means of hook-bolts 14, which may be hung on the lower tension member 6 and are provided with lower' plates, which support the meeting edges of adjacent tiles or centers. The centers being notched slightly are hung in place, and the concrete may then be supplied and the beams formed, after which the bolts and supporting-plates may be removed.

Instead of using concrete main beams which are formed in place I may use the ordinary main beams 15, as shown in Fig. 3, the concrete being lled in between the anges and the tension members of the transverse Webs on each side being connected together by stirrup 16,'A which is preferably formed of spring metal, so as to put a slight tension on the webs. In both forms the end portions of the refractory center next to the wall or the main beams are preferably cut back or beveled, so as to allow the concrete of each beam to be integrally connected at these points, as shown in Figs. 1 and 3.

Instead of having'the concrete of adjacent transverse beams integrally joined over the tops of the hollow centers I may use separated transverse concrete beams, as shown in Fig. 5. In this form the refractory centers 10 are provided with upwardly-projecting IOO iianges 17, which form the sides of the upper part of the concrete beam 18, thus separating them and leaving spaces over the hollow centers for the reception of piping or wires. In this form I also preferably use the web or latticed central grid 19 for each concrete beam.

When a tile Iiooring is used, the wooden sleepers are dispensed with.

The advantages of my invention will be apparent to those skilled in the art, since a simple construction of great strength is afforded which can be easily formed in place and can be built without the use of metal connections between the main beams. The use of the concrete beams with the central strengthening-grid insures a strong structure, While the hollow tile or centers reduce the weight and cheapen the cost. The tiles serve to protect the concrete from heat, thus doing away with the objection to ordinary concrete constructions. The formation of the strengthening-grids may be Widely Varied, and many otherchanges may be made in the form and construction without departing from my invention.

I claiml. In fireproof floor construction, a series of concrete beams, having door-sleepers embedded in their top portions and extending longitudinally thereof; substantially as described.

2. In ireproof door construction, a series of concrete beams with reinforcing metallic grids, and having arched connecting tops forming compression members and refractory centers between the beams; substantially as described.

3. In ireproof floor construction, a series of transverse parallel concret-e beams, each having a lower metallic tension member, and a latticed construction extending upwardly therefrom and embedded in the concrete, and Wooden sleepers partially embedded in the concrete and extending longitudinally of the lattice-Work; substantially as described.

4. In iireproof floor construction, Wooden sleepers having depending web members secured thereto and embedded in concrete, and supports upon the web members arranged to hold the hollow refractory centers in place; substantially as described.

In testimony whereof I have hereunto set my hand.

CHARLES F. BUENTE.

Vitneeses:

H. M. CORWIN, CHAs. C. BITTNER. 

